I deal with stuff like this on a daily basis as I'm in a hybrid function in support / sys admin. We get this not from managers, but from our users. "Hei this is how we would like to work, can you please change the system?"

While I absolutely understand the reason for this, it's hard to do for 600 users. And our new boss also supports this approach because we need to be a good service provider for our internal customers. But always having to research if the requests even are implementable and what the implications of the implementation are is so fucking time consuming. I still have other shit to do.

What I want to say is, I feel like I shouldn't always have to be the one to directly receive (change) requests but they should already have been checked and approved.

I shouldn't have to do 1. & 2. or even 3. from your list. I should receive a clear work order and then look into the implementation.

But I guess that's wishful thinking.